Shane Carwin can pinpoint the exact moment he lost his UFC heavyweight title fight against Brock Lesnar. His record says submission via arm triangle, second round, but forget that. That's just when the fighting officially stopped. Really, he lost it in the first, when his body began to fail him.

"First time it's ever happened to me in my life," Carwin says in his soft, low voice that forces you to lean in just to catch what he's saying. "It was terrible."

It started with a strange feeling that flooded over him right as he was at his most dominant point in the fight. One minute he was focused entirely on pounding Lesnar into an early stoppage, and then the next thing he knew he was all too aware of his surroundings, and in all the wrong ways.